<template>
  <div>
    <el-form ref="deptForm" :rules="rules" :model="form" label-width="120px">
      <el-form-item label="部门名称" prop="name">
        <el-input v-model="form.name" style="width:80%" placeholder="1-50个字符" />
      </el-form-item>
      <el-form-item label="部门编码" prop="code">
        <el-input v-model="form.code" style="width:80%" placeholder="1-50个字符" />
      </el-form-item>
      <el-form-item label="部门负责人" prop="manager">
        <el-select v-model="form.manager" style="width:80%" placeholder="请选择">
          <!-- <el-option value="1" :label="小美丽" /> -->
          <el-option
            v-for="item in employees"
            :key="item.id"
            :label="item.username"
            :value="item.username"
          />
        </el-select>
      </el-form-item>
      <el-form-item label="部门介绍" prop="introduce">
        <el-input v-model="form.introduce" style="width:80%" placeholder="1-300个字符" type="textarea" :rows="3" />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" size="small" @click="hSubmit">确定</el-button>
        <el-button size="small" @click="hCancel">取消</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
// code	string	非必须		部门编码，同级部门不可重复
// introduce	string	非必须		介绍
// manager	string	非必须		负责人名称
// name	string	非必须		部门名称
// pid	string	非必须		父级部门ID

import { getEmployees } from '@/api/employees'
import { addDepartment, getDepartmentDetail, updateDepartment } from '@/api/departments'
export default {
  props: {
    id: {
      type: String,
      required: true
    },
    isEdit: {
      type: Boolean,
      required: true
    },
    originList: {
      type: Array,
      required: true
    }
  },
  data() {
    const validCode = (rule, value, callback) => {
      // value 当前校验的值
      // 如果校验通过 callback()
      // 如果校验不通过 callback(new Error('错误说明'))
      let originCodes = this.originList.map(item => item.code)

      // 如果是编辑状态，则 需要把 当前的部门编号从 已有的编号列表中排除
      if (this.isEdit) {
        originCodes = this.originList.filter(item => item.id !== this.id).map(item => item.code)
      }
      console.log('当前要校验的值', value, originCodes) // RSB

      // 如果RSB在originList中已经出现，则校验失败
      if (originCodes.includes(value)) {
        callback(new Error(value + ' 已存在'))
      } else {
        callback()
      }
    }

    const validName = (rule, value, callback) => {
      // 同级不重复
      // 找下级部门；找到pid为 this.id值 的部门
      let originNames = this.originList.filter(item => item.pid === this.id).map(item => item.name)
      if (this.isEdit) {
        // this.id ==> 当前部门的id
        // 找这个元素，拿他的pid
        const cur = this.originList.find(item => item.id === this.id)
        const pid = cur.pid
        // 找这个元素的同级元素，并去掉自己
        const brothers = this.originList.filter(item => item.pid === pid && item.id !== this.id)
        originNames = brothers.map(item => item.name)
      }

      console.log(value, originNames)
      // 判断当前的名称是否在 已存在的数组中
      if (originNames.includes(value)) {
        callback(new Error(value + ' 已存在'))
      } else {
        callback()
      }
    }
    return {
      rules: {
        // name: [
        //   { required: true, message: '部门名称不能为空', trigger: 'blur' }
        // ]
        name: [
          { required: true, message: '部门名称不能为空', trigger: 'blur' },
          { min: 1, max: 50, message: '部门名称要求1-50个字符', trigger: 'blur' },
          { validator: validName, trigger: 'blur' }
        ],
        code: [
          { required: true, message: '部门编码不能为空', trigger: 'blur' },
          { min: 1, max: 50, message: '部门编码要求1-50个字符', trigger: 'blur' },
          { validator: validCode, trigger: 'blur' }
        ],
        manager: [
          { required: true, message: '部门负责人不能为空', trigger: 'blur' }
        ],
        introduce: [
          { required: true, message: '部门介绍不能为空', trigger: 'blur' },
          { min: 1, max: 300, message: '部门介绍要求1-300个字符', trigger: 'blur' }
        ]
      },
      form: {
        name: '', // 部门名称
        code: '', // 部门编码
        manager: '', // 部门管理者
        introduce: '' // 部门介绍
      },
      employees: [] // 员工列表
    }
  },
  watch: {
    // id: function(newVal, oldVal) {
    //   console.log(newVal)
    //   // 发请求做数据回填
    //   if (this.isEdit) {
    //     this.loadDepartmentDetail()
    //   }
    // }
    // id: {
    //   handler: function() {

    //   },
    //   deep: true,
    //   immediate: true
    // }
  },
  created() {
    console.log('子组件被创建了...')
    this.loadEmployees()

    // 发请求做数据回填
    if (this.isEdit) {
      this.loadDepartmentDetail()
    }
  },
  methods: {
    async loadDepartmentDetail() {
      console.log('要去请求', this.id, '的详情')
      const res = await getDepartmentDetail(this.id)
      this.form = res.data
    },
    async loadEmployees() {
      const res = await getEmployees()
      console.log(res)
      this.employees = res.data
    },
    async doAdd() {
      const d = { ...this.form, pid: this.id }
      console.log(d)
      await addDepartment(d)
      // this.$emit('自定义事件名')
      this.$emit('success')
    },
    async doEdit() {
      await updateDepartment(this.form)
      // this.$emit('自定义事件名')
      this.$emit('success')
    },
    hSubmit() {
      // 手动兜底校验
      this.$refs.deptForm.validate(valid => {
        // console.log(valid)
        if (valid) {
          this.isEdit ? this.doEdit() : this.doAdd()
        }
      })
    },
    resetForm() {
      // 重置表单
      console.log('子组件重置表单')
      this.$refs.deptForm.resetFields()
    },
    hCancel() {
      this.$emit('close')
    }
  }
}
</script>
